Apparatus for mining and loading coal



5 Sheets-Sheet l A wr@ 9, 1930. E. c. MORGAN APPARATS FOR MINING ANDLOADING COAL Filed Nov. 19, 1917 NN mwa N Dec. 9, 1930. E. c. MORGANAPPARATUS FOR/*MINING AND LOADING-COAL Filed Nov. 19, 1917 5Sheets-Sheet 2 Dec. 9, 1930. Y E, C, MQRGAN 1,784,156

APPARATUS FOR MINING AND LOADING COAL Filed Nov. 19, 1917 5 Sheets-Sheet3 N 'uuu @d d "Wh un C, or an @M55 @wlw S31/m #M j Dec. 9, 1930.

E. C. MORGAN APPARATUS FOR MINING AND LOADING COAL Filed Nov. 19, 1917 5Sheets-Sheet 4 Ummm Edina/zd folyan @www Dec. 9, 1930. IE. c. MORGAN1,784,156

APPARATUS FOR MINING AND LOADING COAL Filed Nov. 19, 1917 5 Sheets-Sheet5 y LAT/ff /fcomm f 7 /r CK:

adm y M/ 0c ff* M 1am/MA f\ COAL /V hvuhw', 1 "vl l$/ 1" MAQ y f M/ g wwm S11/vm j" .jj Ed nd 0.Mor aM M$WV` /7 @WMA/M 4MM j Patented Dec. 9,1930 STATES PATENT ori-tice i MUNI) A'(2. MORGAN, 0F NEW 1YORK, N. Y.;OLIV EUGENIE MORGAN EXECUTRIX 0F EDMUNDfC. MORGAN,

. mmrns Fon marmo, AND mAmNGeoAL Application leg Nveniber 19, 1917.SerialfNo; 202,825.

'The object of this invention is to provide aLmore efiicientfmethod ofmining andgload- 'ing' coal Land other material and'V improved mechanismfor carrying on such process.

'The :invention is exemplified'in the combination and arrangement ofparts shown in 'the'accompanying drawings and ldescribed in 'thefollowinfr the Vprocess vdcescribed thereinfand the invenlo-tion-gislmore particularly pointed out inthe Vzo appended claims.

1n `thedrawings- -Fig 1 is a top plan vview *of one Jorln of machineYincluded inthe 'present invention.

Fig. 2 is `a side elevation showing the machine'in position in aI coalmine.

-Fig. 3 is a vertical sectional View on line 3-31of Fig. 1.

F fig.`4- is a verticalsectionalview'on lline of Fig. 1.

Fig. 5vis a vertical sectional view on' line 5 -5 of Fig. 2.

VFigti 'is a vertical sectional View on line 6`-6`of Fig. 2. Y l

Fig. 7 isa vertical sectional view kon line "7 7 of Fig. 1.

Fig. 8 is a vertical sectional view on line 8 8 of Fig. 2. v

l Fig. 9 is a horizontal sectional view on line 9-`9 of Fig. 7. e

Fig. 10 is an elevation of asupplementary cutter which v,may beused inconnection with the machine shown in Figs. land 2.

Fig.V 11 is a top` plan view of -the*cutter Vshown` infFig. 10 with thecutting chain omitted. Y j

'Figs.\12,- 13, 14a-nd' y15 are diagrammatic views Irepresn-sntingdifi'erent steps-'inthe process of mining coal in which the machineshown in 'theo'ther views is employed.

The machine,-as shown in Figs. 1 and 2,

inclrides'a central section A,l afforwafrdV sec` tion`Bl,l anda Vrealsection C, the sections 1B and" "CJheingpivotallly connected with thecentral section to "swing laterally about uprightaxes. K

Asshownlmost dearly in Fig. '2 ofthe drawings, theinnmeral'l representsthe main frame vrof a lmining machine v which carries irpwa-rdiyprojecting standards--`l6 `and 17.

specification and 4the steps of -A=1nain'driving motorv 18 is carried onthe upper surface of the `tframemernber 15 and 'ist provided with ashaft 19' 'journaled in a bearing 20 supported bythe standard 16. rPhestandards 16 'and 17- at theirnpperends st'ipportfr a conveyer fra1ne`21in fixed ipositionrr'elative'to ythe base plate l5 and at the forwardend of the plate 115, assh'ownmore yclearly in Fig. 4, is a'station'aryupright shaft 22`5Whichfhasits Vlower end secured to the base A15 'anditsnpper end held vby the'orwa-rd portion of the conveyer' frame 21.VThe 'uprightshaftg22 forms a pivotal support for. the main frame 23 offthe'i'orWard-setion-B offt'hefminin'g machine. The frame/member 23,-asshown inv Fig. 4,3is I'bifurc'ated to fform yan-npfper fplate`24 and alower-plateV 25 which engage *the 'shaft ,22. Between the plates 24'and' 25- a beveled gearwheelQGis journaled on the shaft'f22andisldri'venbya 'pinion 27 securedlto theforward e'nd of 'the 'shaftfl9-The flower surface #of the gear wheel 26 is provided "with teeth 28which meshf-with a pinion-29 securedto afshaft 301which is Yjournaledin`v` fthe-1 ra'mei23fand which iearriesl'a pinion' Blion -itsdforwardend. Thepinion 31, asshownlinFig. 8,Ineshes with a pinion 32 on '1a-countershaft-BS jonrnaled in the *frame 23, from `which countershaftthe mechanism-carried -by the' forward portion B lof thehmachineisvdriv'en. The-'portion vBinc'lindes thec-ntting and breaking apparatusforfdislodg'ing the coaflfromllits Vnative bed and includes the main`frameimember A23 which swings about its i pivotal support-122and-'which Acarries 'the cutting and `breaking mechanism'together withyal conveyerl. forrreceiving-thematerialfas it is dislodged. The j frame'.niember! 23V .has extending aroundr Lits periphery a chainguide C34Fin which vthe 'lower cuttin' idhain travels. This chainfis driven, asin Fig.- 4,-by a `.sprocket Wheel y36 keyedu to the hub v0i lthe Kegear26. The iframe member 23 ailso =carries fguideways STfora c'onveyer 38which receives the materialas it ris'ldislodged rand carries itrearwardily anddischargesit into the `c'onveyer 21 ofithelcentral'iseetienof the machine. The

conveyer, asshow-n-in Figs. 4f and 8,is

the upper portion of the conveyer 2l and is free to be moved upwardly ifthe section B of the machine is swung to one side a` sui'lion 45 intocontact with the upwardly ined portion of the conveyor 21.

frame member 23 is provided with up- 46, 47 and 48, each of whichcarries eaded standard 49 arranged to telescope into the upper end ofits upright. The standards 49 support a frame member 50 which carries acutter chain 51, the frame and chain constituting an upper korf-cutterwhich is adjustable vertically by movement of the standards 49 into andout of their respective supports. Each standard 49 is pro ided with asprocket wheel 52 which rests upon the top of its support, and a chain53 is arranged to drive the sprocket wheels 52 inunison with oneanother. An idler sprocket k54, Fig. 1, guides one run of the chain 53to hold the chain out of the way of the material which is being mined.The idler sprocket may be supported from the upright 47. One of thesprockets 52 is provided with a worm wheel 55 rigidly connectedtherewith by means ofy which the chain 53 is driven.

- The worm wheel 55 is rotated by a worm 56 having a crank 57connectedtherewith and being supported by a bracket 58 on the upright46. lt is apparent that rotation of the hand crank 57 will rotate thesprocket wheels in which the standards 49 are threaded and thus move theupper korf-cutter vertically to adjust it to various positions. Thecutter chain 51 is driven by a sprocket wheel 59 mounted at one cornerof the upper kerfcutter and rigidly secured to an upright shaft 6()journaled in a bearing 61 which is connected with the frame of the upperkerfcutter. rfhe bearing 61, as shown in Figs. 7 and 9, is connectedwith the cutter frame 50 by a bracket 62 which extends laterally on eachside of the bearing. As shown in Fig. V8, the shaft is provided with atelescopic extension 63 and the lower end of the shaft is =rovided witha bevel gear 64 which meshes with a similar gear 65 carried onthe end ofthe shaft 33. By 'this arrangement the chain 50 may be driven at thevarious positions of vertical adjustment of the upperkerf-cutter. Theforward end of the conveyer frame 21 is provided with a fixed racksegment 66 with which a worm 67 meshes for swinging the cutter section Bof the machine laterally about its pivotal support 22. The worm 67 isrigidly connected with a transverse shaft amount to bring the end of thepivoted 68 which carries a worm wheel 69 rigidly secured thereto, asshown in Fig. 3. The worm wheel 69 meshes with a worm 7 O secured to anupright shaft 71 and mechanism is provided, as shown in Figs. 3 and 8,for imparting two different speeds of rotation to said shaft. y Theupper end of the shaft 71 carries a pinion 72 meshing with an internalgear 73 loosely mounted on the shaft 60 while a larger pinion 74 mesheswith a spur gear 75 also loosely mounted on the shaft 60. The gears 73and 75 may be selectively connected with the shaft 60 to rotatetherewith by means Y of a clutch 76 having an operating handle 77.

it is apparent that different speeds of rotation may be imparted to theshaft 71 by the two sets of gears thus provided and that the cuttingsection B of the machine will be correspondingly fed laterally about itspivot 22 at speeds depending upon the particular set of gearing which isused.

A breaker is provided to travel in the kerf formed by the u1 per cutterfor the purpose of dislodging the coal and breaking it down onto theconveyer 38. This breaker, as shown in Figs. 1 and 7, comprises acylinder 8O in which a piston 81 is mounted for reciprocation. Thepiston 81 is normally held retracted within the cylinder by a spring 82and when so retracted the piston and cylinder will enter the kerfyformed by the cutter-chain 51. The cylinder is provided with a pair ofloops 83 which loosely engage a rod 84 connected with the frame member50 of the upper kerf-cutter and provided with a coiled spring whichnormally forces the cylinder into a position close to the rear of thecutter-chain. vWhen the piston is forced outwardly by mechanism to bedescribed, the breaker will be held stationary by contact with the coalat each side of the kerf while the cutter continues to feed forwardly.The spring 133 upon the rod 84 will be compressed during this stage ofthe operation until the breaker has eX- panded a suficient amount todislodge the coal with which it is in Contact after which the springwill return the breaker to its normal position. The piston 81 isoperated by liquid forced through the pipe 85 into the cylinder 80 bymeans of a pump 86. The pump 86 is provided with a piston 87 connectedby a strap 88 with an eccentric 89 keyed to the shaft 60. rlhe pump issupported by a yoke 90, which passes around the bearing 61 extendingthrough openings in the bracket 62 provided for that purpose. rhisarrangement permits of the pivotal movement of the breaker relative tothe kerfcutter during the time that the breaker is held stationary whilethe cutter continues to move forwardly. Liquid is supplied to the pump86 from a tank 91 provided with the usual valve 92 for controlling theflow of liquid. A check valve 93 is interposed between the pump 86 andthe pipe 85 to prell (l l upwardly toward the kerf -ornie'd'by'the up-vvent return flow of liquid to the pump, and a three-Way valve 94 havingan operating handle 95 is placed within the pipe 85 where it unites withbranches 96 and 97 leading to the tank 91 and the pump 86 respectively.By means of the valve 94 the cylinder 80 may be connected either withthe tank 91 to permit collapse ofthe breaker, or with the pump 86 tocause expansion of the breaker for dislodging coal. I

AIn Figs. 10 and 11 there is shown a supplementary kerf-cutter which maybe used to form an'upright cut along the arcuate surface described b theouter end of the swinging' section B. -his kerf-cutter comprises` aguide frame 98 in which achain 99 slides,

the frame being curved to correspond to the curvature of the arc throughwhich the cutv ting mechanism swings. The frame 98 is supported by apair of bars 99 slidably mounted in a frame 100 carried by a bracket 101adj ustably secured to the upright post 46 by means of a split collar102 and clamping bolts 103. The bracket 101 carries a motorl 104 whichdrives a shaft 105 through gearsV 106 and 107. The shaft 105 ispiovidedwithv a sprocket wheel 108 Yby means of which the chain 99 is driven.The supporting bars 99 may be adjusted within the frame 100 by` means ofascrew 110 to vregulate the tension in the cutter chain 99. *When thismechanism is used in connection with the cutter section B the chain 99will cut an arcuate kerf between the mine wall and the material beingsevered which extends -rom la point adjacent the kerf formed bythelowerpcutter 35 per cutter 51. The distance betweenthe arcuate'edge ofthe upper kerfand the-upper horizontally eXtending-kerf will varyaccording vto the height to which the upper kerf-Vy cutter isadjusted,'andthe strip of coal fre# maining between the two kerfs .will`be broken when thev severed section is dislodged by the hydraulicbreaker 80. The coal, of course, is

broken do vn by this hydraulic breaker while it is in position above theconveyer 38 and before it is reached by the upright 46, so that it doesnot interferewith the motor and other mechanism supported by thisupright.

'lVhen the coalis discharged from the rear end 450i the forwardconveyer, it enters the hopper at the forward end of the conveyer 21 andis moved,` Vupwardly by this conveyer Luntil it is discharged into therear section C of' the mining and loading machine.' Y The conveyer 2lisdriven by a motor 109 which is geared to a shaft 110 having the usualsprockct wheels for operating the conveyor chain.v

Apair of screw jacks 111 are carried vby theV upper portion of theconveyer frame 21 for engaging the root ofthe minefto hold the main orintermediatesection A of the machine stationary whilea cutis beingYtaken.

'i Theiuc'lination of therframe 15 may be varied.

gagement with the floor of the mine and thus tip the frame 15 to adjustthe position of the swinging cutter. The vscrew jack '115 is mountedupon the casing of the motor 18, as shown in Fig. 6, which casing alsocarries a bracket-11G on which` is mounted a motor 117 driving a windingdrum 118 by means of which the machine may be moved forwardly within themine chamber after each cut is made by the swinging section B.

In a machine of this character it is sometimes-desirable to remove themotor armature for repairs or other purposes, and because of theposition of the motor relative y to the other `parts it would bedifficult to accomplish such removal inthe usual way. f F or this reasonthemotor casing is split upon Ya lplane passing through the center oftheshaft 19 andthe two sections are held togetherbybolts 120. The shaft l19is pro-v 1 as resting directly on the mine Hoor but truck wheels 123 areshown in broken lines in these views to indicate the position that suchwheels occupy while'themachine is being transported f.

into and out of operating position. A track 124 is also indicated inbroken lines in these views.V This track, of course,is not shown in lits true position relative to the mine loorbut only indicates therelative position of the minf ing'machine and trackduringtransportation.

Therusualvopeiation is to bring the machine into position within thechamber' while it is supported on its truck wheels 123 resting upon Athemine track. After the machine is so positioned, the truck wheels are.removed andthe frame-15 is permitted to rest upon the floor oftheminechamber. `During operation theA frame isr slid forwardly over thefloor yof the'chamber by the rope winding mechanism'llS 4and the trackislaid in the rear of the macliine'for accommodating the '.fi

cars tortransportin'g the mined material.

The rear sectionC comprises a hopper 125 which is pivot-ally.supportedat 126 on the frame 15 and which is `provided with an aline ingpivot 127 at the upper portion of the hopperV carried'by a `bracket -128.connected with the conveyer frame. 21. A'iiexible convveyer V129oi'f'usual/ construction 'is arranged 'to travel. ginfthe bottoml of;the hopper'f125.

and 'is-driven `by a'motor 130` geared vto a' zir' cross shaft 131carrying sprockets 132 for driving the conveyer 129, as shown in Fig. 5.

The diagrammatic views in Figs. 12 to 15 inclusive, illustrate themethod of mining coal by using the machine described under diihcultoperating conditions, such as wher a layer of slate is interposedbetween two layers of coal. Under' these conditions the lower vein ofcoal may be first mined by operating the cutter section B with the upperkerf-cutter in a lowered position, as shown in Fig. 13. After the lowercoal has been thus removed, the layer of slate may next be taken out byoperating the cutter section with its upper lierf-cutter raised to aposition above t-he upper surface of the slate. During this cut thelower lrerf-cutter will move in unison with the upper cutter but willnot be required to form a kerf. The slate as it is dislodged may beloaded into a car and hauled from the mine, or it be discharged into thegob at the side of the mine chamber, as indicated in broken lines in yFig. 12. Vhere this is done, it will, of course,

be necessary to remove a sulicient number of the mine props to permitthe discharge section C of the machine to be swung to one side. Theseprops may bereplaced after the discharge section is returned toposition. In

this connection it may be noted that the machine is quite narrow incomparison with the width or" the chamber which it opens and the propstherefore may be obviously placed at the side of the machine up towithin a short distance from the mine face. After the slate has beenremoved, in the manner indicated in Fig. 1l, a third cut may be taken,as shown in Fig. 15, with the upper kerf-cutter raised to a positionadjacent the roof of the mine, thus removing the remaining coal abovethe stratum of slate. v

It should be particularly noted that the upper cutter frame. 50, asshown in Fig. 1, is provided with a large opening so that material maybe dislodged from the space above the cutting section B directly throughthe opening in the cutter frame onto the horizontal portion of theconveyer 37. For instance, after a section of coal has been mined andloaded in a manner diagrammatically illustrated in Fig. 13, theintermediate layer of slate may in some instances be dislodged manuallyand permitted to drop through the opening in the cutter frame 50directly onto the conveyer 37. For this purpose, if desired, the cuttersection B may be swung around in accordance with the progress made inthe dislodgement of the layer of slate. rl`he loading of the slate willof course occur separately from the loading of the coal. lVhen theforeign materialis mined and loaded,it is preferably directed to thegob, as illustrated in Fig. 12 by the dotted lines. It may also occurthat in some instances the upper vein of coal, as illustrated in Fig.15,v could be dislodged and permitted to fall through the opening in thecutter frame 50 onto the conveyer 37. If the vein of coal at the roof isquite thin and may be easily dislodged from the stratum of rock above,it may be more practicable to dislodge the coal manually than to takethe time to cut it. Although it is preferable to dislodge an upper layerof material through the opening in the cutter frame 50 onto the conveyer37, it may be dislodged directly onto the floor of the mine chamber atthe arcuate mine wall while the cutter section B is in initial position.Then the dislodged material may be shoveled onto the conveyer 87,- or ifdesired, the under-cutter may be fed through the pile of dislodgedmaterial so that thel conveyer 37 may be moved under the material andtake the latter into thehopperat the lower end of the conveyer 21, thelatter taking it in turn into the storage hopper 125.

It should also be noted that both the cutter section B and the rearconveyer section C have a. swinging movement on upright axes of 180degrees or more. The U-shaped frame 128 is so associated with theT-shaped eXtension from the hopper 125 to the shaft 127 that the rearconveyer section C may be swung to positions in alinement with theintermediate conveyer. or at substantially right angles theretoat'either side of the main frame without interfering in the least withthe free passage of material from the conveyer 21 through the opening inthe U-shaped frame 128 into the hopper 125.

Attention isalso called to the fact that it is preferable to employseparate electric motors 109 and 130 for operating the conveyers 21 and129 respectively. The conveyer 129 may then be stopped at any timedesired while the conveyer 21 may be continued in operation to graduallytill the hopper 125. A separate electric motor is also preferable forthe rope winding mechanism 118 shown in Figs. 2 and 6 so that themachine may be pulled forwardly or rearwardly independently of theVoperation of any of the other motors. The cutter section B ispreferably operated by the separate electric motor 18. This electricmotor 18 is preferably series wound so that the power exerted therebywill be in accordance with the work to be done, the greater theresistance to feed on account of the condition of the material, thegreater the current that will be taken by the motor and therefore thegreater the power thereof, as is well understood. inasmuch as theconveyer 37 is always operated when the cutters operate, and thematerial is broken down by the breaker 80, no separate electric motorfor the conveyer 37 is provided but power is transmitted thereto fromthe motor 18 by means of the mechanism shown'in Fig. 8. However, whendesired, the conveyer 37 may be thrown out of operation by releasing theclutch 43 shown in Fig. 8. The clutch 76 is arranged,..

as shown in Figs. 3 and 8 so thatit may occupy a mid-position andtherefore when .desired, feeding movement may bev interrupted while theconveyer 37 is operating and ma.- terial is being dislodged above thecutter sec- .tion B through the opening in the cutter frame onto saidconveyer 37. c

On account of the arrangement of the mechanism for driving thekerf-cutters, the motorrlS may be placed under the conveyer 21 so thatthe apparatus will bel then compact. While the lower or-fioor cutterchain extends rearwardly under thehopper at the lower end of theconveyer 21, the upperkerffcutter occupies a position at its rear end inadvance of the conveyer 21. Therefore the range of vertical adjustmentof the upper kerf-cutter 51 may be increased without interfering withthe movement of the pivoted section 45 of the conveyer 37 when thelatter is to be swung to positions where the section 45 tends to abutagainst the inclined sides of the conv'eyer 21.

It should also be. noted that the sprocket l chain 53 which meshes withthe sprockets of the nuts at the upper ends of the posts 46, 47 and 48is directe by the idler sprocket 54, as shown in lFig. l, to a positionvwhere there will beminimum'interference with the free passage ofvdislodged material through the cutter frame 50.v The screw-threadedsupports 49 whichcarryithe upper kerf-cutter and Vwhich are threadedthrough the rotary i? nuts'at the upper ends of the spaced-apart uprightstandards 46, 47 andv 48, are simultaneously lifted or lowered so as tosecure a rectilinear upf and down movement of the u per ykerf-cuttertogether with the breaker 8d), as shown in Fig. 1f' f Obviously thoseskilled in the art may make various changes in the details and arranements of arts herein shown and descri ed without eparting from thespirit and scope of my invention as defined by the claims heretoappended, and I wish, therefore, not to be restricted to the preciseconstruction disclosed.' V

I claim: y 1. A mining machine lcomprising a frame,

'y a cutter carried by said frame, a jack comprising a U-shaped barpivotally connected with said frame, and a lever for tilting said barabout its pivot to adjust the height of f'fa portion of said framerelative to the surfaceV tiltingsaid bar about its pivotal connectionwith said frame, and a screw for operating saidlever to tilt said,frame4 vertically to adjust thepositiouof said cutter.

3. In a mining machine, a frame, a horip zontallyextending cutterpivotally carried by said frame for swinging movement laterally yaboutan upright axis, a second horizontally extending cutter connected withsaid first cutter and spaced upwardly therefrom,

and extensible uprights for supporting said second cutter. I y

4. In a mining machine, a frame, Va cutter head pivotally mounted` onsaid frame to swing laterallyA about an upright axis, a pair ofvertically spaced horizontally extending kerf-cutters carried by saidcutter head, an upright kerf-cutter carried by said cutter headsubstantially in*v alinement with the outer portions of saidhorizontally extending cutters, a support for said upright cutter in therear'thereof, and means for dislodging the material partially severed bysaid cut- .ters to provide clearance for said support as said cutterhead is swung about its vertical axis.

5. Ina mining machine, a frame, a cutter head pivotally mounted on saidframe to Vswing laterally about an upright' axis, a pair of horizontallyextending vertically spaced kerf-cutters carried by said cutter head.,and

triangularly arranged uprights for holding of uprights for holding saidkerf-'cutters in spaced relation to one another, said uprights beingpositioned at three of the corners of said rectangular -shaped cuttersleaving the space between the forward and the outward edges of saidcutters open to permit the material being severed to pass between saidcutters as said cutter head is swung about' its pivot.

7. In a mining machine, a cutter head comprising a pair of verticallyspaced hori* zontally extending substantially rectangularshapedrkerf-cutters, uprights extending between saidv cutters and located atthe inner and `rear corners of the rectangle formed by said cuttersleaving the space between the forward and outer edges of said cuttersfree to permit the material being severed to enter between said cutters,a conveyer carried by said cutter head and movable into the kerf formedby lthe lower one of said cutters, and means `for dislodging saidmaterial to cause it to be deposited upon said conveyor and transportedto a loading position thus providing clearance for the outer upright eXtendingbetwen said-cutters.

S. In a mining machine, a critter head comprising upper and lowerkerf-cutters,` standards for holding said cutters in spaced relationrelative to one another, said standards being arranged inwardly and inthe rear of the operating edges of said cutters, and an uprightkerf-cutter secured to one of said standards for forming a kerf alongthe vertical side of the material above and below which thefirst-mentioned kerf-cutters operate.

9. In a mining machine, a frame, a cutter head pivotally mounted on saidframe to swing about an upright axis, a pair of horizontally extendingvertically spaced kerfcutters carried by said head, a standard forholding said cutters in spaced relation, and an upright cutter securedto said standard comprising a cutter chain and a guide for said chaincurved to conform to the curvature of the arc described by the outermostportions of said spaced cutters.

10. In a. mining machine, the combination with a cutter-frame having theshape of a segment of an annulus, of an endless chain cutter mounted totravel around the perimeter of the annular cutter-frame, and means forpivotally supporting said cutter-frame for arcuate swinging movement onan upright axis.

11. In a mining machine, an uprightcutter means for swinging said cutterabout an upright pivot to feed said cutter into the material to bemined, said cutter being curved to conform to the curvature of the arcthrough which it swings, a support for said cutter positioned in therear thereof, and means for dislodging said material after it has beenpassed by said cutter but before it has been reached by said support,thus providing clearance for the passage of said support during theswinging movement of said cutter.

12. In a mining machine, a pivotally mounted cutter head arranged toswing laterally about an upright axis, an upright standard carried bysaid cutter head, an upright critter mounted on said standard and curvedto conform to the curvature of the arc through which it swings, a motorfor driving said cutter connected with'said standard in the rear of saidcutter` and means for dislodging material adjacent. said cutter but inadvance of said motor to provide clearance for the passage of said motorduring the feeding movement of said cutter head.

13. In a mining machine, al pivotally monnted cutter head arranged toswing laterally about an upright axis, an upright standard carried bysaid cutter head, a bracket adjustably mounted on said standard, a chainguide carried by said bracket, a cutter chain slidably mounted on saidguide, a motor carried by said 1oracket for driving said chain, andmeans for adjusting said guide relative to said bracket for regulatingthe tension of said cutter chain.

11i. In a mining machine, a pivotally mounted cutter head arranged toswing laterally about an upright axis, a pair of vertically spacedhorizontally extending kerf-cutters on said cutter head, an uprightstandard connecting said ycutters adjacent the outer and rear edgesthereof, a bracket carried by said standard, a chain guide carried bvsaid bracket,l a cutter-chain slidably mounted on said guide, a motorcarried by said bracket for driving said cutter chain, and means fordislodging material adjacent said cutter-chain and guide and betweensaid spaced cutters to provide clearance for said standard and motor`when said cutter head is swung about its pivot during a miningoperation.

15. In a mining machine, a pair of vertically spaced horizontallyextending kerf-cutters, a plurality of adjustable standards for holdingsaid cutters in spaced relation relative to one another, sprocket wheelsmounted on each of said standards for adjusting the length thereof, andan endless chain for driving said sprocket wheels in unison with oneanother.

1G. In a mining machine, a pair of vertically spaced horizontallyeXtending kerf-cutters, a plurality of standards for holding saidcutters in spaced relation with one another, said standards includingthreaded sections and sprocket wheels for co-operating with saidsections to adjust the length of said standards, an eXtensible shaft foroperating one of said kerf-cutters, and an endless chain for drivingsaid sprocket wheels in unison with one another to adjust the positionof said kerf-cutters relative to one another.

17 In a mining and loading machine, the combination with ay main frame,of a main conveyer mounted on'said frame, al swinging frame mounted onsaid main frame, kerfcutting mechanism, breaking mechanism, operatingmechanism, and conveyer mechanism mounted on said swinging frame to movetherewith, a. motor mounted on said main frame below said main conveyer,and gearing for transmitting power from said motor to the saidkerf-cutting mechanism and said breaking mechanism, said operatingmechanism and the conveyer mechanism on said swinging frame while thelatter is swinging.

18. In a mining and loading machine, the combination with a main frame,of a supplemental frame mounted on said main frame to swing on anupright axis relatively thereto, a kerf-cutter mounted on said supple.-mental frame in position to cut a kerf at the base of a mine wall alongthe floor of a mine chamber, means for driving said kerfcutter, meansfor swinging said supplemental frame to effect feeding movement of saidkerf-cutter, dislodging mechanism mounted on said supplemental frame forvertical adjustment above said floor kerf-cutter andv for bodilyswinging movement -with said supplemental frame, and conveyor mechanismmounted on said supplemental frame to swing bodily therewith in positionfor au-tomatically receiving the dislodged material and conveying ittoward loading position.

19. In a mining and loading machine, the combination with a main frame,of a vertical shaft mounted on said main frame, a. swinging framemounted on said vertical shaft, two kerf-cuttersl carried byV saidswinging frame, a gear rotatably mounted on said vertical shaft, means4connecting said gear to one of said kerf-cutters, and separate meansconnecting said gear to the other kerf-cutter. 20. In a mining machine,Ithe combination with a main frame, of ka supplemental frame connectedthereto, spaced-apart kerf-cutters mounted on said supplemental frame,power transmission .gearing for driving said kerfcutters, powertransmission gearingY for swinging said supplemental `frame on anuprifrht axis relatively to said main frame to e ect arcuate feedingmovement of said kerfcutters, and means mounted on said main frame fortra-nsmittingpower to bothof said power transmission gearings to effectthe operation. of `said kerf-cutters.

21. In a mining machine, the combination with a main. fra1n.e,of. asupplemental `frame pivotally connected to-said main vframe. to swingrelatively thereto -onran uprightaxis, kerf-cutters mounted onsaid'supplemental frame to occupy verticallyspaced-apart positions tocut kerfs extendin@r in general horizontal directions at differentelevations, driving gearing for said kerf-cutters, means for swingingsaid supplemental frame on said upright axis to secure arcuate feedingof said kerf-cutters, means mounted. on said main frame for transmittingpower to said drive gearing and said swingingr meansto effect theoperation of said kerf-cutters, and a source of power on said mainframe.

22. In a. mining machine, the combination with a main frame, ofasupplemental frame connected to said main frame. to swingon an uprightaxisV relatively to said main frame, a lower horizontal kerf-cuttercomprising a cutter chain extending around said upright axis, an upperkerf-cutter mounted on said supplemental frame with its rearend in frontof said upright axis, and meansfor. operating said lower and upperkerf-cutters including swinging movement of saidvsup-Y plemental frameVto effect feed of saidV cutters.

23. In a mining machine, the combination with' a main frame, of anupright journal bearing on lthe forward end of said main frame, asupplemental frame journaled on saidl bearingfor swinging movementrelatively to said 11minY frame on-the .upright axis of said journalbearing, a gear rotatably' mounted on said journal' bearing, a motor onsaid mainframe connected to said gear to drive the same, an under cuttermountedon said supplemental frame and comprising an endless cutter chainextending around said upright axis, af driving sprocket wheel con-'nec-ted to rot-ate with said gear on said journal `bearing, in positionto drive said under Y cutter, an upper kerf-cutter mounted on said 24.In a miningmachine, the combination w1th supporting frameworkcompri-sing lspaced-apart upright supports, a kerf-cutter mounted onsaid spaced-apart upright supports and comprising a cutter-frame rigidlyconnected to said supports fory adju-stment in elevation, andmeansconnected to each of said supports forsimultaneous op'- eration to movesaid kerf-cutter up and down rectilinearly to adjust the elevationthereof while maintaining the rigid connectionbetween saiduprightsupports and said cutterframe. Y

25. In a miningmachine, the combination with `supporting frameworkVcomprising spaced-apart screw-threaded supports, a horizontalkerf-cutter mounted on top of said supports, means rotatably mounted .onsaid screw-threaded supportsto effect the adjustment in elevationof'said horizontal kerf-cutter, and mechanism for simultaneouslyoperating said adjusting; means.

26.4 Ina mining machine, the combination with supporting framework.comprising spaced-apart upright screw-threaded suports, a Imton eachsupport, ahorizontal lprf-cutter mounted on, said supports, and meanscomprising au endless sprocket chain for. rotating the nuts on saidscrew-threaded supports to Vadj ust the elevation of said horizontalkerf-cutter.

27. In a mininof machine, the combination with sup orting framework, ofa horizontally extentiing kerf-cutter pivotally connected to saidframework for swinging .movement about an upright axis,A a secondhorizontally extending kerf-cutter spaced upwardly from saidfirst-namedr kerf-cutter, extensible uprights for supporting saidsecond-named kerf-cutter at various elevations, and means for operatingsaid-kerf-cutters including arcuate feeding movement thereof on saidupright axis. i

28. In a mining machine, the combination with a main frame, of asupplemental frame pivotally4 connectedthereto, a motor mounted on themainframe, aworm gear Vfixed, to Said .mainframegearing;Connected-between,

ige

said motor and said worm gear for moving said supplemental frame in anarc ou s., upright axis, a horizontal korf-cutter comprising an endlesscutter chain and a cutter frame mounted on top of said supplementalfra-me, and power transmission gearing between said motor and saidcutter chain for driving the latter.

29. In a mining machine, the combination with a main frame, of asupplemental frame pivotally connected to said main frame to swingrelatively thereto on an upright axis, a gear on said main framerotatable on said upright axis, a motor on said main frame connected tosaid gear to drive the same, a horizontal lrerf-cutter comprising acutter chain and a cut-ter frame mounted on top of said supplementalframe, and a train of drive gearing between said first-named gear andsaid cutter chain and comprising a. forwardly extending shaft, atransverse shaft and a vert-ical shaft.

30. In a mining machine, the combination with a main frame, of a wormgear iixed thereto in stationary position, a supplemental framepivotally connected to said main frame to move in an arc concentric tosaid worm gear, a worm on said supplemental frame in position with saidworm gear, a horizontal shaft for carrying said worm, a horizontalkerf-cutter mounted on said suplemental frame, means forv driving said{erf-cutter, feed gearing connected to said worm to drive the latterslowly to effect slow movement of said le-rf-cutter in feedingdirection, and mechanism for eifecting reversal of said feed gearing andquicker movement of said kerf-cutter to restore the latter to initialposition.

3l. A mining machine comprising a horizontal korf-cutter having a cutterframe with a large opening therein for the passage of material dislodgedabove said kerf-cut-ter, a plurality of spaced-apart supports for saidcutter frame to hold the same at adjusted elevation in substantiallyhorizontal position, adjust-ing devices on each of said supports, meansfor simultaneously operating` said adjusting devices to secure verticalrectilinear movement of said cutter frame for varying the elevation ofsaid kerf-cutter, and means for supporting said simultaneously operatingmeans to extend alongpositions leaving the opening through said cutterframe free and unobstructed.

82. In a. mining machine, the combination with a main frame, of a.supplemental frame pivotally connected to said main frame for swingingmovement relatively thereto on an upright axis, lerf-cutting mechanismmounted on said supplement-al frame in elevated position, saidkorf-cutting mechanism comprising an endless cutter chain mounted on theperiphery of a cutter frame having a free and unobstructed openingextending traneversely therethrough for the passage of ina-- terialdislodged above said korf-cutting mechanism, means for operating saidherfcutting mechanism including swinging of said supplemental frame tosecure arcuate feeding movement of said korf-cutting mechanism, andloading apparatus mounted on said main and supplemental frames andcomprising a conveyer extending to a receiving position below the saidopening in said cutter frame.

33. In mining apparatus, the combination with a. wheel supported rigidbase frame adapted to runupon the rails of a mine track for transportingt-he mining apparatus, said base frame being adapted to be lowered topermit the same to rest on and be supported by a mine floor, of asupplemental frame pivotally connected to said base frame to swinglaterally relatively thereto, a plurality of upright supports mounteddirectly on said supplemental frame and extending upwardly therefrom atthe angles of a relatively widely extended horizontal polygon, a rigidcutter frame, means carried by and vertically adjustable on said uprightsupports for carrying said cutter frame in a substantially horizontalplane, an endless cutter chain mounted on said cutter frame, a motorcarried by said base frame, and driving connections whereby the power ofsaid motor caused to drive the said cutter chain and to move thesupplemental frame laterally to feed said cutter chain.

34. In a. mining apparatus, the combination with a wheel supported baseframe adapted for transporting the mining apparatus, said base framebeing adapted to be lowered to rest on and be supported by the floor ofa mine chamber, hert-cutting apparatus extending horizontally forwardfrom said base frame in iixed relation to said base frame, and meanscomprising a bell crank lever for engaging the floor of the mine chamberat the rear end of said base frame to tilt the latter and vary theinclination of said hert-cutting apparatus.

35. In a mining machine7 the combination with a supporting frame, ofthree upright threaded supports mounted on said supporting frame at theangles of a horizontal triangle, cutter mechanism comprising a cutterframe mounted on said supports, nuts on the said supports, and means forsimultaneously turning said nuts to secure rectilinear verticaladjustment of said cutter apparatus transversely thereof.

36. In a coal cutting machine, the combination with a movable supportingframe, of three spaced-apart vertical threaded supports on saidsupporting frame, coal cutting mechanism mounted on top of said supportswith the periphery of said cutting mechanism in plan surrounding saidsupports, means on said supports for adjusting the elevation of saidcoal cutting mechanism, and-means for operating said coal cuttingmechanism at its adjusted elevation. v

37. In a coal cutting machine, the combination with a movable supportingframe, of three spaced-apart vertical standards extending upwardly fromsaid supporting frame, three screw-threaded rods respectively extendinginto said standards, nuts mounted on said standards and in threadedengagement with said screw-threaded rods, sprockets on said nuts, a-sprocketchain engaging each of said sprockets, a horizontal kart-cuttermounted on top of said screw-threaded rods, means for driving saidsprocket chain to rotate said nuts to secure simultaneous up or downmovement of said screw-threaded rods and thereby adjust said ker-cutterrectilinearly and vertically into various horizontal planes, and meansfor operating said kerf- Vcutter at its adj usted elevations.

V zontally Vin planes near the top of the said movable base, an endlesscutter` chain on said cutter frame, a motor on the base frame below theplanes of the cutter frame, gearing for transmitting the power of themotor to drive the cutter chain, a winding drum on the base frame, acable connected at one end to said drum to be wound thereon and adaptedto be connected at the other end to a point external to the machine, anadditional motor connected to said drum to rotate the same and move themachine as a whole, means for adjusting the elevation of said cutterframe and cutter chain relatively to said supplemental and base frames,and means forswinging said supplemental frame on said vertical axis tosecure arcuate feeding movement of said cutter chain.

39. In a wheelfsupported coal mining machine `adapted to be transportedover mine tracks to cut a horizontal vkerf while resting on the floor ofa mine chamber beyond the forward end of said track, the combinationwith a base frame, of track wheels for supporting said base frame on themine track during transportation of the whole machine, saidV wheelsbeing detachable to permit said base frame to rest on the floor of themine chamber beyond the forward end of said track, rope Windingmechanism mounted on said base frame and comprising a rope adapted to beconnected to an anchorage for sliding the base frame over the floor ofthe mine chamber to new position-s, anchoring lmechanism for holdingrthe base frame in adjusted position, a supplemental frame pivotallyconnected to said base frame for lateral movement relatively thereto onan upright axis, dislodging mechanism mounted on said supplementalVflame,.and means operating said dislodging mechanism including rlateralarcuate movement of said su plementa'l -frame.

40. In 'a' system o coal mining apparatus comprising agroundsupportedgtrack anda portablev mechanism adapted toy betransported oversaid trackand beyond the .for-l ward end thereof for sliding support onthe mine floor, and also ada ted to cut a horizontal kerf in a coal faceW ile supported on the mine fioorinfadvance of said track, thecombination with a rigid baseframe, of wheels adapted to beconnectedtosaid base frame for vtransporting the machine over said mine track, a,supplemental-frame pivotally; connected to said baselframe for swingingmovement 'relatively thereto onlan upright axis,

mental frame extending horizontally vto points outside of and remoteVfrom Vthe verti' caly bounding lines of said 4base frame and. its rearend extending backover the base Vframe, supporting connections betweenthe rear'end of said supplemental frame and the base frame comprising ahorizontallycxtendedrotaryfbase structure pivotallydisposed 'at' theforward vend of said i base frame, power mechanism for driving the*`kerf-cutting mechanism, power mechanism constructed and arranged to movethe supplemental frame laterally from points 4on one side of the machineto points at the other side thereof, and a motor on the vbase frame foractuating said power mechanisms. f. v

'41. Inramining machine, the combination with a main frame, of asupplemental frame pivotally mounted on said main-frame for swingingmovements relativel .thereto on an uprightaxis, ahorizontal ker -cuttermounted on said supplemental frame for adjustment in elevation, vmeansfor holding the kerf-cutter at adjustedelevation, meansqfor operatingsaid kerf-cutterincluding swinging movement of said supplemental frameto secure feeding movement of said ker-cutter, and breaking mechanismcarried by said supplemental framefor operation inthe kerf cut by saidkerf-cutter ,toy break down the slabs of materialbelowy-the plane oflsaid kerfcutter. v. 1 f

42. In a mining machine, the-combination with a mainframe, oflpropellingmechanism therefor, a supplemental frame pivotally connected tosaidvmainframeffor. lateral swingingmovement in advance thereof on an uprightaxis, means 'comprising a worm gear ilnmovably secured to said main`framefor swinging said; supplemental frame relatively propellingmechanism to effect rectilinear e one end of said main frame and whilelocked by said worm gear againstfturning relatively to said main frameto effect the cutting of a kerf to one side of the path of travel ofsaid main frame and substantially parallel to such path of travel andina plane substantially perpendicular to such upright axis.

43. In a mining machine, the combination with a main frame, of asupplemental frame pivotally connected thereto, horizontal kerfcuttingmechanism mounted on said supplemental frame, propelling mechanism formoving said main fra-me rectilinearly to effect' rectilinear feedingmovement of said kerf-cutting mechanism, means for swinging saidsupplemental frame to effect arcuate movement of said supplementalframe, and breaking mechanism mounted on said supplemental frame withinthe boundary of said kerf-cutting mechanism to act in the kerf cut bythe latter to break down material adjacent said kerf.

44. In a mining machine, the combination with a main frame, of wheelsadapted to support said frame on a. mine track, a supplemental framepivotally connected to said main frame to swing on an upright axisrelatively thereto, kerf-cutting mechanism mounted on said supplementalframe, means for driving said kerf-cutting mechanism, means comprising aworm gear immovably secured to said main frame for swinging saidkerf-cutting mechanism to secure n lateral feeding movement thereof, andpropelling mechanism for said main frame to move the latter along themine track to effect rectilinear feeding movement of said kerf-cuttingmechanism while said supplemental frame is locked by said worm gearingagainst turning movement relatively to said main frame. Y 45. In amining machine, the combination with a main frame, of wheels forsupporting said main frame on a track, horizontally extendingkerf-cutting mechanism mounted to swing as a unit on an upright axis atthe forward end of said main frame,`means for driving said kerf-cuttingmechanism, a worm gear immovably secured to said main frame for swingingsaid kerf-cutting mechanism as a unit relatively to said main frame, andpropelling mechanism for moving said main frame along a track to secureforward rectilinear movement of said kerf-cutting mechanism whenextending laterally from one side of said main frame and locked by saidworm gearing against turning movement relatively to said main frame, andfor effecting rearward rectilinear feeding movement of said kerf-cuttingmechanism when the latter extends laterally from the other side of theforward end of said main frame and while said vcutting mechanism islocked by said worm gearing against turning movement relatiVely to saidmain frame.

4 6. In a system of coal mining devices comprising a track extendinglongitudinally toward the coal face, and mining mechanism thereonarranged to cut kerfs which extend across the central longitudinalvertical plane of the track, the combination of a wheeled truck restingon the track, of three vertically elongated guide supports respectivelyat the angles of a triangle in horizontal plan, a. frame verticallyadjustable connected to each of said guide supports independently of theothers and forming a base in a relatively high plane, ar kerf-cuttersupported on said vertically adjustable frame and extending forward topoints in front of the truck and adapted to be moved, while cutting,laterally across the longitudinal vertical planes of the truck, amotordirectly on said truck, and

means connected between said motor and said.

kerf-cutter to drive the latter and move the same laterally across thefront end of said truck.

47. In a coal cutting machine, the combination with a rigid base frame,of a supplemental frame pivotally connected to said base frame, threetriangularly arranged upright spaced-apart supporting devices fixedlymounted on said supplemental frame, a cut- .r

ter-frame mounted on top of said devices with the space above and belowone corner thereof free and imobstructed, means for adjusting theelevation of said cutter frame relative to said supplemental frame, anendless cutterchain mounted on said cutter-frame to encompass the areaof connection between said supporting devices and said cutter-frame,means for driving said cutter-chain, and means for swinging saidsupplemental frame to effect the arcuate feed of said cutter chain tocut material extending along said unobstructed space. f

48. In a coal cutting machine, the combination with a movable baseframe, of supporting track wheels therefor, a cutter apparatus movableas a imit with respect to the base frame about a normally Vert-icalaxis, and comprising kerf-cutting mechanism extending outwardly beyondthe said base frame along normally horizontal lines near theuppermost'plane of the machine, the said cutter mechanism being movableacross one end of the machine about the said vertical axis through anarc extending at each side beyond the verticall plane of thecorresponding track wheels, means comprising a worm gear concentric withsaid vertical axis and immovably secured to said base frame for swingingthe said cutter apparatus about said vertical axis, said worm gearingbeing capable of locking the cutter apparat-us to the base frame at anyof several angles, means for driving said Ycutter apparatus, and meansfor moving the machines bodily while the cutter apparatus is inoperation and locked ing against turning. Y

49. In a wheel-mounted coal mining ma-V chine adapted to be transportedover mine tracks and to cut a horizontal kerf in a coal face, thecombination with a base frame, of track wheels for supporting said frameon a mine track, a supplemental frame carried by said base frame andmounted to turn in relation thereto in normally horizontal planes,continuously acting cutter devices carried by said turning supplementalframe and adapted when said frame turns to cut a horizont-al kerfextending transversely across the track on which the machine stands,means comprising a worm gear immovably secured to said base frame forturning said last-named frame, said worm gearing when not driven beingcapable of locking said supplemental frame against turning, a motor foractuating by said worm gearsaid turning means, means for transporting ithe. whole machine to secure rectilinear movement of said turning framewhen extending fromone side of said ybase frame and locked againstturnin means for driving said cutter devices during such rectilinearfeeding movement thereof.

50. In a mining machine, the 'combination withV a main frame, of wheelsfor supporting theframe on amine track,I a supplemental frame pivotallyconnected to said main frame to swing relatively ,thereto on an uprightaxis, kerf-cutting mechanism mounted on said supplemental frame, a-motormounted on the main frame, power transmission `mechanism between saidmotor and said kerf-cutting mechanism, means for vertically adjustingthe kerf-cutting mechanism in horizontal parallelism and adapted to holdit either where it will form a kerf in relatively low horizontal planesor where it will form a kerf in other horizontal planes relativelyhigher than those aforesaid, and power-actuated mechanism connectedbetween said motor and said supplemental frame and comprisin wormgearing between the latter and sai main frame, a worm wheel being fixedto the latter and a worm beingon the supplemental frame in mesh withsaid worm wheel for causing the said kerf-cutting mechanism to be fedlaterally across the frontend of said Y main frame while saidkorf-cutting mechanism is being driven.

' 51. In mining apparatus, the combination with a main frame, of wheelsfor supporting f said frame on acentrally arranged track, a

tal korf-cutter .chain on said `.cutter .frame dee by said worm gearing,and

ame, means for-.driving said cutter.

of elongated guider supports respectively' spaced-apart 1in angularrelation ahead of Y said main frame, afcutter lframe.connected to saidguide supports and verticallyadjustable thereon, an endless cutterchainon said cutter frame in vposition forward offvertical lines throughthe orwardend of said main frame,and means for operating said cutterchain including feed vthereof by swinging said supplementall frametransversely acro the longitudinal planes of said mainframe to cut kerfsextending across the longitudinal .vertical plane of the mine tracks.53, In mining apparatus, the combination with a horizontal 'supportingframe',` of 'an auxiliary frame Vcomprising a plurality 'of postsextending upward `from said supporting frame, ai h'o'rimntalcutter`ramesup-l ported on said posts at'two adjacent sides. leaving thecutting lengths and the space beneath the forward portion of 'the'cutter frame, relative to feeding direction, free and unobstructed, anendless chain cutter on the cutter frame, means for operating Ysaidchain cutter including feed thereof, and breaking mechanism following inthe kerfcut 'b said cutter to break down fthe material' be ore it isengaged by said auxiliary frame.V

54. In mining apparatus, the combination with a main frame, of aconveyer thereon having a rear upwardly inclinedportion extending from ahop er atlthevforward end of said frame, a supp emental frame pivotallyconnected to said main frame adjacent said hopper, a conveyer extendingfrom a forward horizontal portion upwardly and rearwardly to delivermaterial into said hopper, an undercutter surrounding the. horizontalportion of said second-named conveyer, dislodging mechanism above saidundercutter, means for swinging said undercut-ter, swinging conveyer anddislodging mechanism as a unit through one hundred eighty degrees ormore while the conveyer thereof remains in delivery communication withsaid hopper, a rear swinging conveyer mounted on, the rearlend of saidmain frame to swingy through .one hundred eighty degrees or` more whileremaining in communication with lthel intermediate conveyer on said mainframe, a deep hop r between the rear end ofthe intermediate conveyerandthelower receiving end of said rear oonveyer, and means for pivotallysupportingv said rear-.conveycr :and IVsaid p hopper for 'free land'`nostmcted'defito no j

livery of material into 'said hopper whether directed back to a mine carto load coal mined by said dislodging mechanism or directed to agob tounloadforeign material mined by said dislodging mechanism.

55. In mining apparatus, the combination with a main frame, of aconveyer mounted thereon and inclined upwardly towardthe rear, .a hopperat the forward end of said conveyer, a supplemental frame pivotallyconnected to the forward end of said main frame adjacent. said hopper,an additional conveyer on said supplemental frame for deliveringmaterial into said hopper, kerf-cutting and breaking-.mechanism on saidsupplementalframel for dislodging material onto said additionalconveyer, said additional conveyer comprising pivotally connectedsections topermit swinging of said supplemental frame through an angleof one hundred eighty degrees or more andretain delivery communicationbetween said additional conveyer and said first-named conveyer, andmeans for operating saiddislodging mechanism including swinging of saidsupplemental frame.

56. In a mining and loading machine, the combination with a main frameadapted to slide over the floor of a mine chamber, of wheelsadapted tobe connected to said frame for transporting the same along a mine track,a hopper at the forward end of said frame. a. conveyer` extendingupwardly toward the rear from said hopper, a motor-under said conveyeron said frame, a separate motor for driving said conveyer, means foranchoring` said main frame to the y floor of the mine chamber, a rearswinging conveyer pivotally connected to the rear end of said main frameand extending rearwardly on an upward incline, a separate motor fordriving said rear conveyer, a deep hopper in receiving communicationwith said first-named conveyer through a range of angular movement ofsaid rear conveyer of one hundred eighty degrees or more, framework forpiivotally supporting said hopper todrive a free and unobstructeddelivery space from said first-named conveyer throughout the swingingrange of movement of said rear conveyer, a supplemental frame pivoted tosaid main frame at the forward end thereof for swinging movementrelatively to said main frame on an upright axis, a chain kerf-cuttermounted on said supplemental frame in position to' cuta horizontal kerfat the base of an upright mine wall, an upper horizontal chainkerf-cutter spaced above said first-named `kerf-cutter, means foradjusting the elevation of said upper kerfcutter, said upper kerf-cutterhaving an unobstructed opening therethrough for the passage of materialfrom above the plane of thev upper kerf-cutter to the space below suchplane, means in said opening in the upper kerf-cutter for breaking downcut material,

av conveyer mounted on the supplemental frame and having a horizontalreceiving portion anda-delivery portion extending rearwardly andupwardly to said first-named hopper, means mounted on therear end ofsaid main frame for t-ilting the latter to adjust the position of saidkerf-cutting mechanism, worm gearing between said main and supplementalframes for locking the kerf-cutters against rotation, propelling'mechanism on said main frame for eifecti ng rectilinear feeding movementof said kerf-cutters when locked against swinging movement, meansconnected between said motor on the main frame and said worm gearing forswinging the supplemental frame and the kerf-cutters and the conveyerthereon relatively to said main frame, and means between saidkerfcutters and the motor on the main frame for driving saidkerf-cutters.

57. In a mining and loading machine, the combination with mechanism forcutting spaced-apart plane kerfs horizontally across a mine wall, of aframe for supporting said kerf-cutting mechanism for arcuate feedingmovement, loading apparatus comprising a conveyer having superposedportions traveling in oppositieV directions and extending to a positionback of said kerf-cutting mechanism and in position on said supportingmeans to follow said'kerf-cutting mechanism in its arcuate feedingmovement, and an upright arcuate kerf-cutter mounted on said supportingmeans to operate at or near the inner ends of the kerfs produced by saidfirst-named kerf-cutting mechanism.

58. The combination with a kerf-cutter comprising a frame, of a breakingdevice, a pipe for mounting said breaking device in thev plane ofsaidframe, and means connecting said pipe to said breaking device to conductthe operating pressure medium thereto.

59. The combination with a kerf-cutter comprising a frame, of a fluidpressure breaking device, and a pipe for mounting said breaking devicein the plane of said frame and also servingto conduct the pressuremedium to said breaking device.

f '60. The combination with a kerf-cutter adapted tocut an upright kerfina mine vein spaced back from the working face, of an expansible.dislodging device comprising a cylinder and a plunger, mounted on saidkerfcutter to move bodily therewith into the kerf cut thereby butoperable independently of the feed of said kerf-cutter, a pipe mountedon said kerf-cutter and connected to said cylinder to hold the latterinpredetermined relation to said kerf-cutter and for limited movementrelatively thereto with the outer surface of the plunger bearing againstthat wall of the kerf remote from said working face, and means forcontrolling the expansion of the plunger from said cylinder toward -forma kerf substantially in vertical alinement with the inner edges of thekerf formed by said horizontally extendingchain cutters, andpressure-exerting lmechanism mounted on one of the horizontal chaincutters.

62. In a mining machine, the combination with a supporting frame, of apair of vertically spaced traveling kerf-cutters pivotally i mounted onsaid frame for lateral movement relatively thereto, means comprising anupright standard for connecting said kerfcut` ters, and an uprightkerf-cutter having the shape of a segment of an annulus and carried bysaid standard in position to cut a kerf between the kerfs cut by saidpair of kerfcutters.

63. The Vcombination with a mining machine having a kerf-cutter at itsforward end, of spaced-apart bell cranks pivoted to the rear portion ofsaid mining machine to oc` cupy upright planes parallel to thelongitudinal length of the machine, and mechanism for operating saidspaced-apart bell cranks to adjust the height of the rear end of themining machine and therefore the inclination of said kerf-cutter at theforward end of the mining machine.

In testimony whereof I have signed my name to this specification, onthis 17th` day i of November, A. D. 1917.

EDMUND C. MORGAN.

